Syracuse, NY -- An unfounded drowning call during a concert Wednesday night at Syracuse's Inner Harbor was reported by a man who lives at a home for the mentally challenged, according to police reports.

The multi-agency search cut short the Hump Day Concert Series.

The 45-year-old man was "very consistent" to authorities that his friend had fallen into the water about 9:30 p.m. and didn't come up, the reports state.

But he refused to look the officer in the eyes while talking and appeared nervous. His facts were also somewhat "muddled," the reports state. A worker at the home told police the man suffers from dysthymic disorder, which causes chronic depression.

The man told police he and a friend were talking when his friend fell in between the dock and wall. He said he attempted to help by reaching over the wall, but he could not reach the water. He ran to find a security guard, but didn't tell anyone else because he didn't think they could help, reports state.

When authorities checked the area, they found a wet retaining wall indicating it had been splashed where someone might have fallen in. The dock itself was dry, meaning no one had exited the water there, according to reports.

When firefighters pulled up several planks on the dock, they found a 40-ounce bottle of malt liquor floating in the water. The man said his friend was drinking from that bottle when he fell in.

The Liverpool fire department was called to assist in a search. After the search was completed with no one found, the divers reported that the construction of the dock and underwater conditions made it impossible for anyone to have drowned and floated away from that area, the reports state.

The man was taken to the police station, where he reiterated his story to detectives.

The investigation remains open. Police have not found the man reported to have fallen into the water.